i have read many people got a cold/ flu like symptoms when coming off m1t or at the tail end of a stack. it also happened to me but i upped my vitamin c intake with natural foods plus vitamins and it slowed it down a bit. Your strength lose is almost surely a combo of the both if that makes sense. Your immune system is down plus you are omiting the m1t so naturally you are weaker. Alot of people have had sucess with adding creatine at the begining of pct even if it is a small amout once a day before your workout. This could help you with the negative feeling you may have with strength drops during your workout. Also a energy stimulant whether caffeine or whatever you prefer helps to keep you motivated and feeling good for your workouts. Your gains actually look very good especially since you took m1t without 4ad.